The Biggest Duvet Inners & Covers Available in NZ and Australia
If you've ever searched for bedding to fit an oversized, California King, Alaskan King, or Caesar bed — you'll know the frustration. Standard sizing stops at Super King. What comes after that is a patchwork of custom orders, overseas shipping delays, and bedding that simply doesn't drape the way it should.
This guide covers the largest duvet inners and duvet covers available to order in New Zealand and Australia — what sizes exist, what they're called, and where to find them.
Why Standard Bedding Doesn't Fit Oversized Beds
Most mainstream NZ and Australian retailers stock up to Super King (265cm x 210cm) and California King (270cm x 240cm). For anyone sleeping on an Alaskan King (213cm x 274cm) or a Caesar/8ft bed (244cm x 244cm), standard sizing leaves you with inadequate drape, exposed mattress edges, and a bed that never quite looks finished.
The solution is purpose-made oversized bedding — and it's rarer than it should be.
The Largest Duvet Sizes Available in NZ & Australia
Here's a breakdown of the oversized duvet sizes we stock and ship across New Zealand and Australia:
Caesar / 8ft King — 320cm x 320cm
The Caesar is the largest standardised duvet size available. Designed for 8ft bed frames and Caesar-format beds, it offers a full, even drape on all sides of even the deepest mattresses. Rarely stocked by mainstream retailers — this is a specialist size.
Alaskan King — 350cm x 245cm
The Alaskan King duvet inner measures 350cm x 245cm, making it one of the widest duvets available in the Southern Hemisphere. Designed for the Alaskan King bed frame (213cm x 274cm), it provides generous side drape and full coverage across pillow-top and deep-pocket mattresses.
California King — 270cm x 240cm
The California King duvet is stocked by some mainstream NZ and Australian retailers, but coverage can be inconsistent. At 270cm x 240cm, it suits the California King bed frame and provides a generous drape on standard-depth mattresses.
Super King — 265cm x 210cm
The Super King is the largest size stocked by most mainstream NZ and Australian retailers. If your bed is a standard Super King, this is your size — widely available from Adairs, Sheridan, and similar.
NZ King — 245cm x 210cm
Often confused with Super King, the NZ King (245cm x 210cm) is a common size stocked across mainstream NZ retailers. It suits a standard NZ King bed frame but will fall short on wider or deeper mattresses.
Duvet Inners: What to Look For in an Oversized Size
At larger dimensions, fill quality matters more — not less. A poorly filled oversized duvet will bunch, shift, and lose loft faster than a well-constructed one. Here's what to look for:
- Fill composition: An 85/15 duck feather and duck down blend offers the ideal balance — feather provides structure and loft, down provides warmth and softness.
- Shell fabric: Pure cambric cotton breathes naturally and prevents fill from escaping. Avoid synthetic shells in large sizes — they trap heat and don't regulate temperature well.
- Baffle box construction: Keeps fill evenly distributed across the full surface area — critical in oversized formats where fill can migrate to edges.
- Weight: Larger duvets are heavier. Ensure your duvet cover has strong, reinforced corner ties to hold the inner in place.
Duvet Covers for Oversized Beds
Finding a duvet cover to match an oversized inner is often harder than finding the inner itself. Most linen brands cap out at Super King. For Caesar, Alaskan King, and California King covers, you need a specialist supplier who makes to order.
At The Foxes Den, our oversized duvet covers are made from 190gsm European flax linen — heavier than most linen on the market, with a texture that softens beautifully over time. Each cover is finished in New Zealand and available in a curated range of colourways designed to work across a range of interior palettes.
Key features of our oversized linen duvet covers:
- 190gsm European flax linen — substantial, breathable, and long-lasting
- Available in Caesar, Alaskan King, and California King formats
- Finished in New Zealand
- Ships to NZ and Australia
- Made to order — allow 3–4 weeks
How to Choose the Right Size
Use this as a quick reference:
- NZ King bed: NZ King duvet — 245cm x 210cm
- Super King bed: Super King duvet — 265cm x 210cm
- California King bed: California King duvet — 270cm x 240cm
- Alaskan King bed (213cm x 274cm): Alaskan King duvet — 350cm x 245cm
- Caesar / 8ft bed (244cm x 244cm): Caesar duvet — 320cm x 320cm
As a general rule, add at least 50cm to each dimension of your mattress to allow for adequate drape on all sides. For deep mattresses (30cm+) or pillow-top bases, add more.
Where to Buy Oversized Duvets in NZ and Australia
Mainstream retailers — Adairs, Sheridan, and similar — stock up to Super King and California King. For Alaskan King and Caesar sizes, you need a specialist supplier who manufactures to order and ships directly.
The Foxes Den stocks and ships oversized duvet inners and linen duvet covers across New Zealand and Australia, with manufacturing lead times of 2–4 weeks depending on size and fill.